How do you change app permissions in iOS 7?

When an app wants access to photos or contacts or your location, a popup will open and ask if that is okay.
Also: in Settings under, e.g., Twitter you will see which apps want access to your Twitter account. You can disable access there, too.

When an app wants access to photos or contacts or your location, a popup will open and ask if that is okay.
Also: in Settings under, e.g., Twitter you will see which apps want access to your Twitter account. You can disable access there, too.